<template lang="">
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right" style="margin-bottom: 20px">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item :to="{path:'/goods'}">商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区 -->
    <el-card>
      <div>
        <el-alert title="添加商品信息 " type="info" show-icon :closable="false" center>
        </el-alert>
        <!-- 步骤条区 -->
        <el-steps :space="200" :active="parseInt(activeIndex)" align-center finish-status="success"
          style="margin: 30px 0 15px 0;">
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
        <!-- 添加内容 -->
        <el-form :model="addForm" :rules="addFormRules" ref="ruleFormRef" label-width="100px" label-position="top">
          <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClick">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <!-- 级联选择器 -->
                <el-cascader v-model="addForm.goods_cat" :options="GoodsList"
                  :props="{ expandTrigger: 'hover',value:'cat_id',label:'cat_name',children:'children' }"
                  @change="handleSelect">
                </el-cascader>
              </el-form-item>

            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
              <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                  </el-checkbox>
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="i.attr_name" v-for='(i,index) in onlyTableData' :key="index">
                <el-input v-model="i.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
              <el-upload :action="uploadUrl" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture"
                :headers="headerObj" :on-success="handleSuccess">
                <el-button size="small" type="primary">点击上传</el-button>
                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>

              <el-button type="primary" style="margin-top: 20px;" @click="add">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </div>

    </el-card>
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg">
      </span>
    </el-dialog>
  </div>
</template>
<script>
  import _ from 'lodash'
  export default {
    name: 'Add',
    data() {
      return {
        activeIndex: '0',
        addForm: {
          goods_name: '',
          goods_price: 0,
          goods_weight: 0,
          goods_number: 0,
          goods_cat: [],
          pics: [],
          goods_introduce: '',
          attrs: []
        },
        addFormRules: {
          goods_name: [
            { required: true, message: '请输入名称', trigger: 'blur' }
          ],
          goods_price: [
            { required: true, message: '请输入名称', trigger: 'blur' },

          ],
          goods_weight: [
            { required: true, message: '请输入名称', trigger: 'blur' }
          ],
          goods_number: [
            { required: true, message: '请输入名称', trigger: 'blur' }
          ],
          goods_cat: [
            { required: true, message: '请输入名称', trigger: 'blur' }
          ],

        },
        GoodsList: [],
        selectvalue: '',
        manyTableData: [],
        onlyTableData: [],
        uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
        previewPath: '',
        //图片上传的请求头
        headerObj: {
          Authorization: window.sessionStorage.getItem('token')
        },
        previewVisible: false
      }
    },
    created() {
      this.getGoodsList()
    },
    computed: {
      cateId() {
        if (this.addForm.goods_cat.length === 3) {
          return this.addForm.goods_cat[2]
        }
        return null
      }
    },
    methods: {
      async getGoodsList() {
        let { data: res } = await this.$http.get('categories')

        if (res.meta.status !== 200) {
          return this.$message.error('请求数据失败')
        }
        this.GoodsList = res.data
      },
      //级联选择变幻
      handleSelect() {
        if (this.addForm.goods_cat.length !== 3) {
          return this.addForm.goods_cat = []
        }
      },
      beforeTabLeave(activeN, oldActiveN) {
        if (oldActiveN === '0' && this.addForm.goods_cat.length !== 3) {
          this.$message.error('请选择商品分类')
          return false
        }

      },
      async tabClick() {
        if (this.activeIndex === '1') {
          let { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
          if (res.meta.status !== 200) {
            return this.$message.error('获取动态参数失败')
          }
          res.data.forEach(item => {
            item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')

          })
          this.manyTableData = res.data
          //商品属性
        } else if (this.activeIndex === '2') {
          let { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
          if (res.meta.status !== 200) {
            return this.$message.error('获取失败')
          }
          this.onlyTableData = res.data
        }
      },
      //处理图片预览事件
      handlePreview(file) {
        this.previewPath = file.response.data.url
        this.previewVisible = true
      },
      handleRemove(file) {

        const filePath = file.response.data.tmp_path
        const i = this.addForm.pics.findIndex(x => {
          x.pic === filePath
        })
        this.addForm.pics.splice(i, 1)

      },
      // 监听图片上传成功的事件
      handleSuccess(res) {
        const picInfo = { pic: res.data.tmp_path }
        this.addForm.pics.push(picInfo)

      },
      add() {
        this.$refs.ruleFormRef.validate(async (valid) => {
          if (!valid) {
            return this.$message.error('请填写必要的表单项')
          }
          const form = _.cloneDeep(this.addForm)
          form.goods_cat = form.goods_cat.join(',')

          //处理动态参数
          this.manyTableData.forEach(item => {
            const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
            this.addForm.attrs.push(newInfo)
          })
          this.onlyTableData.forEach(item => {
            const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
            this.addForm.attrs.push(newInfo)
          })
          form.attrs = this.addForm.attrs
          console.log(form);
          //发起请求添加商品
          let { data: res } = await this.$http.post('goods', form)
          if (res.meta.status !== 201) {
            return this.$message.error('添加商品失败')
          }
          this.$message.success('添加商品成功')
          this.$router.push('/goods')
        })
      }

    },
  }
</script>
<style>
  .el-cascader-menu {
    height: 300px;
  }

  .el-checkbox {
    margin: 0 10px 0 0 !important;
  }

  .previewImg {
    width: 100%;
    height: 100%;
  }

  .ql-editor {
    min-height: 300px;
  }
</style>